MultiView Projections I

MultiView Projections I - 1 MEMB113 • 07 Multiview...

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Unformatted text preview: 1 MEMB113 • 07 Multiview Projection Drawing adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING Content • Projection Theory • Multi-view Projection [Planes | Lines] • Multi-view [6 principle views | View placement] • Projection angle [1 st angle | 3 rd angle] • Detail drawing [1-view | 2-view | 3-view drawing] • Creating multi-view drawing • View selection • Line convention • Common feature in multi-view drawing 2 adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.1 Projection Theory • Engineering and technical graphics are dependent on projection methods • 2 methods primarily used – Parallel: object positioned at infinity & viewed from multiple points on an imaginary line parallel to the object – Perspective: object position at finite distance & viewed from a single point Perspective Parallel adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.1 Projection Theory • Projection theory comprises of the principles used to graphically represent 3D objects on 2D media • Based on 2 variables: – Line of Sight (LOS): an imaginary ray of light between and observer’s eye and an object. Parallel – all LOS are parallel; perspective – all LOS start at a point – Plane of projection: an imaginary flat plane where the image created by LOS is projected. 3 adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.1 Projection Theory Projections Parallel Projections Perspective Projections Oblique Projections Orthographic Projections Linear Perspective Aerial Perspective Multiview Projections Axonometric Projections adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.1 Projection Theory: Multi-view 4 adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.1 Projection Theory • Orthographic projection: a parallel proj. technique where the proj. plane is placed between observer and object and is perpendicular to the parallel lines of sight Changing view point adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.2 Multi-view projection • Multiview projection is an orthographic projection for which the object is behind the plane of projection, and the object is orientated such that only two of its dimensions are shown. Orthographic projection – Front View Projection plane object 5 adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.2 Multi-view projection • Multiview drawings – Employ multiview projection technique – Generally three views of an object are drawn – Each view is a 2D flat image adzlyanuar©2004 MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 07 MULTIVIEW PROJECTION DRAWING 5.2 Multi-view projection Top view Right side view 6...
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  • Fall '10
  • Gp.(R)MuzaffarAli
  • Map projection, Orthographic Projection, Dept. of Mechanical Engineering, MULTIVIEW ORTHOGRAPHIC PROJECTION

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MultiView Projections I - 1 MEMB113 • 07 Multiview...

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